We have created a native Revit built library and web based interface for accessing the library. Currently it exceeds 36,000 completed architectural details. These standard details (not simple component families) currently fall under the following categories; Roof, Window, Door and Foundation. We are presently working on stair details, railings, and a system of linking our details and included parametric components to specification sections.
He put together a video demonstration of what they offer (hosted at YouTube) and I've embedded it here if you are interested (nearly 9 minutes long). The service they provide isn't free and each detail will cost you around $15 if you buy them individually. The website says they are offering introductory prices of $12.99 each and they'll reduce the price to $9.99 each for orders of 50 or more details. You can request some free samples for evaluation via email. Here's the video.
Off Topic: I liked the opening/closing music, in the video, by Ronald Jenkees. Reminds me of Michael Lee Firkins style as well as Michael Reese.